Analysis On The Economic Spillover Effect And Impact Mechanism Of Provincial Capital Cities From The Perspective Of Spatial Network

In recent years,China’s regional economic landscape has changed from "overall gathering" to "overall dispersion and classified gathering",and the regional development strategy has accordingly changed from gradient advancement to point area radiation adjustment.Under the current economic environment of economic power transformation and insufficient growth potential energy,new growth drivers,growth poles and regional development strategies need to be cultivated and explored.The situation of asymmetric competition among provinces is severe.The inland provincial capital cities lack the unique regional advantages and industrial foundation in coastal areas.The logic of going hand in hand and emphasizing equal development is not applicable and the support is weak.In addition,Chengdu,Wuhan and other cities are leading the demonstration.The strategy of "strengthening the provincial capital" has sprung up and flourished everywhere,becoming the core city for some provinces to concentrate their advantageous resources and become the province’s voice in provincial competition,The best choice to mitigate the brain drain and attract capital and policy favor.As an unbalanced development strategy,"strengthening the provincial capital" has its unquestionable advantages and inevitability,as well as the worrying siphon effect and imbalance possibility.Therefore,it is of great significance to describe and identify the economic pattern and structural characteristics of cities in the province,and explore the spillover effect and its impact mechanism of provincial capital cities for the effective implementation of the strategy,enabling "marginal" cities,and realizing the comprehensive and sustainable development of the economy in the province.Under different levels of economic development and different regional advantages,whether the "strong provincial capital" strategy is universally applicable,and to what extent,and whether its impact mechanism has certain internal logic and development laws,empirical analysis is made based on this.Based on the theory of growth pole and spatial economics,combined with social network analysis and econometric analysis methods,this paper builds a provincial urban economic network with economic links,and constructs a regulatory effect model based on the panel data of prefecture level cities from 2005 to 2019,to explore the relationship between the spillover effect of provincial capital cities and the closeness,coordination level and centrality of the urban economic network,and to consider the characteristics of samples and the times,In depth analysis of the impact of government intervention and the transformation of economic and technological forms represented by the digital economy on the spillover effect of provincial capital cities,and further exploration of the development direction for the zero sum competition and imbalance situation within the province based on the emerging classical economics,measure and study the formation and development of the pattern of specialized spatial division of labor between cities and cities within the province.The empirical results are as follows:(1)On the whole,the spillover effect of provincial capital cities is mainly positive radiation,but it is heterogeneous for different types of cities.(2)The economic development of local cities has a positive U-shaped relationship with the strength of economic ties between cities in the province,and an inverse U-shaped relationship with the polarization degree of development in the province.(3)The government intervention of local cities has not effectively solved the siphon and return effects brought by the regional development differences,and the effect on undertaking the economic spillover of provincial capital cities is not obvious.(4)Digital economy has not played an effective role in promoting the economic diffusion of provincial capital cities and the economic undertaking of local cities.(5)The improvement of the provincial capital’s economic advantage has a positive regulating effect on the promotion of the functional specialization of surrounding cities that have a certain development foundation and are still in the process of development.